3.Worry,annoy,harass all mean to disturb or interfere with someone's comfort or peace of mind. To worry is to cause anxiety, apprehension, or care: to worry one's parents. To annoy is to vex or irritate by continued repetition of interferences: to annoy the neighbors.Harass implies long-continued worry and annoyance: Cares of office harass a president.6. See concern.

The oldest sense was obsolete in English after c.1600; meaning "annoy, bother, vex," first recorded 1670s, developed from that of "harass by rough or severe treatment" (1550s), as of dogs or wolves attacking sheep. Meaning "to cause mental distress or trouble" is attested from 1822; intransitive sense of "to feel anxiety or mental trouble" is first recorded 1860.